*{
    margin: 0;
    padding: 0;
}
.pro_img{
    width: 616px;
    height: 390px;
    margin: 100px auto;
}

.pro_img{
    width: 100px;
    height: 75px;
    list-style-type: none;
    float: left;
    border: 2px solid whitesmoke;
    padding: 7px;
    position: relative;

}
.pro_img{
    width: 100%;
    height: 100%;
}
.pro_img :hover img{
    width: 200px;
    height: 150px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    z-index: 1;
    padding: 2px;
    border: 2px solid black;
}
